91401255220 has 48 divisors (see below), whose sum is σ = 220412606400. Its totient is φ = 31487512320.

The previous prime is 91401255199. The next prime is 91401255299. The reversal of 91401255220 is 2255210419.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10928985 + ... + 10937344.

It is an arithmetic number, because the mean of its divisors is an integer number (4591929300).

Almost surely, 2^91401255220 is an apocalyptic number.

It is an amenable number.

91401255220 is an abundant number, since it is smaller than the sum of its proper divisors (129011351180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91401255220 is a wasteful number, since it uses less digits than its factorization.

91401255220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21866368 (or 21866366 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 91401255220 its reverse (2255210419), we get a palindrome (93656465639).

The spelling of 91401255220 in words is "ninety-one billion, four hundred one million, two hundred fifty-five thousand, two hundred twenty".